Method for preparing layered structure inorganic perovskite negative electrode material by using gas phase method

A technology of layered structure and negative electrode material, which is applied in the fields of vapor deposition manufacturing, structural parts, electrode manufacturing, etc., can solve the problems of complex production process and high cost, and achieve the effect of simplifying the process, low price and reducing production cost.

Active Publication Date: 2018-10-19
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because graphite and other negative electrode materials need to be graphitized under high temperature conditions, as well as subsequent coating and other processes, the preparation and production process is complicated and the cost is high

Method used

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  • Method for preparing layered structure inorganic perovskite negative electrode material by using gas phase method
  • Method for preparing layered structure inorganic perovskite negative electrode material by using gas phase method

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Effect test

Embodiment 1

[0020] A kind of gas phase method that the present invention proposes prepares the method for layered structure inorganic perovskite negative electrode material, comprises the following steps:

[0021] S1. Weigh a certain amount of lead bromide and cesium bromide powder, place them on the two heating boats of the evaporation system respectively, and paste the copper foil on the tray directly above;

[0022] S2. The vacuum degree of the evaporation system is pumped to 10 -3 At Pa, vapor deposition begins. First turn on the film thickness meter, and heat the burning boat (heating source) filled with lead bromide, start to monitor the film thickness, after 2.5 hours of reaction, turn off the lead bromide heating source, turn on the cesium bromide heating source, and switch the film thickness meter at the same time parameter, start monitoring the cesium bromide film thickness, after 2.5h heating and evaporation, turn off the cesium bromide heating source. The thickness of cesium...

Embodiment 2

[0026] A kind of gas phase method that the present invention proposes prepares the method for layered structure inorganic perovskite negative electrode material, comprises the following steps:

[0027] S1. Weigh a certain amount of lead bromide and cesium bromide powder, place them on the two heating boats of the evaporation system respectively, and paste the copper foil on the tray directly above;

[0028] S2. The vacuum degree of the evaporation system is pumped to 10 -3 Pa, start vapor deposition, first open the film thickness meter, and simultaneously heat the burning boat (heating source) that fills cesium bromide and lead bromide, start to monitor cesium bromide and lead bromide film thickness, after reacting for 5h, turn off Cesium bromide and lead bromide heating source; the thickness of the evaporated cesium bromide is about 5 μm, and the thickness of lead bromide is about 10 μm;

[0029] S3. After the reaction is finished, turn off the evaporation system, take out t...

Embodiment 3

[0032] A kind of gas phase method that the present invention proposes prepares the method for layered structure inorganic perovskite negative electrode material, comprises the following steps:

[0033] S1. Weigh a certain amount of lead bromide and cesium bromide powder, place them on the two heating boats of the evaporation system respectively, and paste the copper foil on the tray directly above;

[0034] S2. The vacuum degree of the evaporation system is pumped to 10 -3 Pa, start vapor deposition, first open the film thickness meter, and simultaneously heat the burning boat (heating source) that fills cesium bromide and lead bromide, start to monitor cesium bromide and lead bromide film thickness, after reacting for 3h, turn off Cesium bromide and lead bromide heating source; the film thickness ratio of evaporated lead bromide and cesium bromide is 1.8:1, and the thickness of cesium bromide is 5 μm;

[0035] S3. After the reaction is finished, turn off the evaporation syst...

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Abstract

The invention discloses a method for preparing a layered structure inorganic perovskite negative electrode material by using a gas phase method, and relates to the technical field of preparation of lithium ion battery negative electrode materials. The method comprises: sequentially or simultaneously depositing lead bromide and cesium bromide on a copper foil substrate under a vacuum condition through a gas phase method, and carrying out heating annealing in air to obtain the layered structure inorganic perovskite negative electrode material. According to the present invention, according to theprinciples of physical vapor deposition and chemical vapor deposition, inorganic lead bromide and cesium bromide are used as raw materials and are deposited on the surface of the copper foil substrate through heating evaporation, the evaporation rate, the deposition thickness and the thickness ratio are regulated, and the subsequent annealing treatment is performed to prepare the dense and uniform pure inorganic perovskite material. With the applications of the layered structure inorganic perovskite negative electrode material in lithium ion battery negative electrode materials, good thermodynamic stability and excellent physical and chemical properties can be achieved, and the process is simple.

Description

technical field [0001] The invention relates to the technical field of preparation of negative electrode materials for lithium ion batteries, in particular to a method for preparing layered structure inorganic perovskite negative electrode materials by a vapor phase method. Background technique [0002] With the continuous development and progress of human society, the dependence on fossil energy is becoming more and more serious. The depletion of fossil energy represented by coal and oil and the environmental pollution caused by the process of development and utilization are becoming more and more serious. Therefore, the development of new renewable clean energy is imminent, and the new renewable energy represented by solar energy and wind energy has been fully developed and utilized in recent years. However, how to efficiently realize energy conversion and storage has always been the focus of attention. Lithium-ion batteries, because of their high operating voltage, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/136H01M4/1397H01M4/04H01M4/36H01M4/58H01M10/0525
CPCH01M4/0421H01M4/136H01M4/1397H01M4/362H01M4/582H01M10/0525Y02E60/10
Inventor 周皖岳童国庆王双双
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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